The Eagles still do not have a full coaching staff as January is quickly fading. New head coach Chip Kelly hired former Browns head coach Pat Shurmur as his offensive coordinator (still not announced yet) but is without a defensive coordinator. With all of the problems that the Eagles experienced on defense this year, many people are waiting to hear who Kelly plans to hire as the defensive coordinator. Former Eagles assistant coach Steve Spagnuolo was fired as Saints defensive coordinator earlier this month who many want to become the Eagles new defensive coordinator but Kelly might be leaning in a different direction.That direction appears to be the 3-4 defense instead of a 4-3. The Eagles have been linked to San Francisco 49ers defensive backs coach Ed Donatell. Donatell was previously the defensive coordinator for the Green Bay Packers from 2000-03 then in Atlanta for the Falcons from 2004-06. In addition to Donatell, Adam Schefter reported this morning that the Eagles interviewed Cleveland Browns’ linebackers coach Billy Davis to be their defensive coordinator. Davis has served as a defensive coordinator in the NFL with the 49ers and Arizona Cardinals.It seemed like Donatell was a sure thing last week but it became less clear today. Jeff McLane of the Philadelphia Inquirer is reporting that, in addition to Donatell, the Eagles are also looking at another coach that is preparing for the Super Bowl. Enter Ravens’ linebackers coach Ted Monachino. Monachino has never been a defensive coordinator at any level but is highly regarded by his players, like reigning defensive player of the year Terrell Suggs.One thing that these candidates have in common is that they will most likely look to install a 3-4 scheme. Some of the Eagles players, like Fletcher Cox, translate well to a 3-4 but it remains to be seen how some other players like Mike Patterson fit.-Steve DolanFollow Steve on Twitter @SDolan3Follow Whiz Wit on Twitter @WhizWitSports